package Year22_Month06.day20;

public class TreeNode {
        int val;
        TreeNode left;
        TreeNode right;
        public TreeNode(){}
        public TreeNode(int val) {this.val = val;}
        public TreeNode(int val, TreeNode left, TreeNode right){
            this.val = val;
            this.left = left;
            this.right = right;
    }
}
